IOS-XE 17.4.x
IOS-XE-17.4.x
Os Release
· Cisco IOS XE 17 software Series
Is IOS-XE 17.4.x still maintained?
No. Cisco no longer maintains IOS-XE 17.4.x; support ended 2026-07-31. It receives no fixes of any kind, including security patches. Devices running it are unpatched against any newer vulnerability — plan an upgrade to a maintained release. See Cisco's lifecycle bulletin.
When do security fixes for IOS-XE 17.4.x stop?
Engineering fixes for IOS-XE 17.4.x — including security patches — stop on 2022-01-28. After that date, a device on this release cannot be patched against newly disclosed vulnerabilities without upgrading, which is the point that matters for KEV exposure and compliance.
What should I upgrade IOS-XE 17.4.x to?
Upgrade to a currently maintained Cisco release. Check the release-train table on the vendor page for the nearest supported version.
What known-exploited CVEs apply to the IOS-XE 17.4.x past end of support?
28 CVEs in CISA's Known Exploited Vulnerabilities catalog affect Cisco IOS-XE. Because IOS-XE 17.4.x is past end of engineering, it will not receive fixes for them — a device left on this release is exploitable with no patch available. Upgrade to a maintained release. See the Known Exploited Vulnerabilities table below for the full list.
Known Exploited Vulnerabilities
This device is past Cisco's security-support date. 28 CVEs in CISA's Known Exploited Vulnerabilities catalog apply to the platform it runs. Cisco is not issuing patches for this model. Isolate, compensate, or refresh.
| CVE | KEV added | Vulnerability | Flags |
|---|---|---|---|
CVE-2025-20352
|
Cisco IOS and IOS XE Software SNMP Denial of Service and Remote Code Execution Vulnerability | ||
CVE-2023-20273
|
Cisco IOS XE Web UI Command Injection Vulnerability | ||
CVE-2023-20198
|
Cisco IOS XE Web UI Privilege Escalation Vulnerability | ||
CVE-2023-20109
|
Cisco IOS and IOS XE Group Encrypted Transport VPN Out-of-Bounds Write Vulnerability | ||
CVE-2016-6415
|
Cisco IOS, IOS XR, and IOS XE IKEv1 Information Disclosure Vulnerability | ||
CVE-2017-6742
|
Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerability | ||
CVE-2017-3881
|
Cisco IOS and IOS XE Remote Code Execution Vulnerability | ||
CVE-2018-0175
|
Cisco IOS, XR, and XE Software Buffer Overflow Vulnerability | ||
CVE-2018-0174
|
Cisco IOS Software and Cisco IOS XE Software Improper Input Validation Vulnerability | ||
CVE-2018-0173
|
Cisco IOS and IOS XE Software Improper Input Validation Vulnerability | ||
CVE-2018-0172
|
Cisco IOS and IOS XE Software Improper Input Validation Vulnerability | ||
CVE-2018-0167
|
Cisco IOS, XR, and XE Software Buffer Overflow Vulnerability | ||
CVE-2018-0159
|
Cisco IOS and XE Software Internet Key Exchange Version 1 Denial-of-Service Vulnerability | ||
CVE-2018-0158
|
Cisco IOS and XE Software Internet Key Exchange Memory Leak Vulnerability | ||
CVE-2018-0156
|
Cisco IOS Software and Cisco IOS XE Software Smart Install Denial-of-Service Vulnerability | ||
CVE-2018-0151
|
Cisco IOS Software and Cisco IOS XE Software Quality of Service Remote Code Execution Vulnerability | ||
CVE-2017-6743
|
Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerability | ||
CVE-2017-6740
|
Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerability | ||
CVE-2017-6739
|
Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerability | ||
CVE-2017-6738
|
Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerability | ||
CVE-2017-6737
|
Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerability | ||
CVE-2017-6736
|
Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerability | ||
CVE-2017-6663
|
Cisco IOS Software and Cisco IOS XE Software Denial-of-Service Vulnerability | ||
CVE-2017-6627
|
Cisco IOS Software and Cisco IOS XE Software UDP Packet Processing Denial-of-Service Vulnerability | ||
CVE-2017-12319
|
Cisco IOS XE Software Ethernet Virtual Private Network Border Gateway Protocol Denial-of-Service Vulnerability | ||
CVE-2017-12240
|
Cisco IOS and IOS XE Software DHCP Remote Code Execution Vulnerability | ||
CVE-2017-12237
|
Cisco IOS and IOS XE Software Internet Key Exchange Denial-of-Service Vulnerability | ||
CVE-2018-0171
|
Cisco IOS and IOS XE Software Smart Install Remote Code Execution Vulnerability |
Source: CISA Known Exploited Vulnerabilities catalog. The Ransomware flag reflects CISA's own knownRansomwareCampaignUse field, set when the CVE has been observed in ransomware campaigns per their threat intel. It's not a property of the vulnerability description itself.
Correlation is at the platform level, not per-OS-version. Not exhaustive: KEV only lists actively-exploited CVEs and many relevant unexploited vulnerabilities are not here. Verify against vendor security advisories (PSIRT, JSA, PAN-SA) and NVD before acting. See compensating controls if refresh isn't immediate.
IOS-XE 17.4.x Release Lifecycle
IOS-XE 17.4.x is a Cisco Cisco IOS XE 17 software software release. Releases are maintained on a fixed schedule: Cisco ships fixes and security patches until the release reaches end of engineering, after which a device must be upgraded to a maintained release to stay patchable. The dates below are milestones for the software train, not for any specific appliance — hardware running this release has its own separate lifecycle. This product has reached end of life as of , meaning Cisco no longer provides technical support, software updates, or hardware replacement for this product. It was last available for purchase on . Organizations still running the IOS-XE 17.4.x should plan a migration .
Lifecycle Milestones
| Lifecycle notice published | 5y 6mo ago | |
|---|---|---|
| End of sale | 5y 3mo ago | |
| End of software maintenance | 4y 9mo ago | |
| End of security vulnerability support | 4y 9mo ago | |
| Last date of support | 3mo ago |